JP3895551B2 - Assembly of optical members - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin optical member such as a lens or a mirror used in an optical head device, for example, and more particularly to an assembly of optical members that can be easily handled during inspection, packaging, assembly, and the like.
[0002]
[Prior art]
An optical head device is provided in various disk devices such as a CD (compact disk) and an MD (mini disk). In the optical head device, various optical members such as a mirror member such as a half mirror or a beam splitter and a lens are used. Light emitted from a light emitting element such as a laser is reflected or transmitted by the half mirror or beam splitter, and guided to the objective lens. In the lens, incident light is condensed at one point, a spot diameter having a constant outer diameter is formed on the surface of the disk, and the reflected light is received through the objective lens, a half mirror, a beam splitter, and the like. Information guided to the element and read from the disk is read.
[0003]
[Problems to be solved by the invention]
Conventional optical members are formed one by one by means such as injection molding. Optical members such as half mirrors and beam splitters need to have a mirror surface or a deflecting surface formed on a surface thereof by a vapor deposition apparatus. In the manufacturing process, the optical members are arranged one by one in the vapor deposition apparatus. There was a need.
[0004]
However, since the optical member is mounted on the optical head device, it is often small. Some optical members have front and back surfaces, but it is necessary to distinguish between the front and back surfaces when assembling.
[0005]
Therefore, if the small optical members are individually manufactured as described above, the handling becomes inconvenient in the subsequent manufacturing stage, quality inspection stage, packing stage, assembly stage, and the like. In particular, since the shape of the objective lens is circular, there is a problem that it is easily lost when dropped from a desk or the like. In addition, in this case, it is difficult to distinguish between the front and back surfaces of the optical member.
[0006]
The present invention has been made to solve the conventional problems, and an object during the inspection, during packaging, to provide an assembly of optical members that facilitate handling such as in the time of assembling.
[0007]
[Means for Solving the Problems]
The assembly of optical members of the present invention includes a resin optical member that reflects or transmits incident light, and a resin connection member that is positioned between the plurality of optical members arranged in a row at regular intervals. The connecting members are provided in pairs between the adjacent optical members, and adjacent optical members are connected by a pair of the connecting members extending in parallel to each other,
Said connecting member of said adjacent optical members intermediate is cleaved the separated individual of the optical member, remain a portion of the separated the optical member and the pair of the connecting member is connected, the optical member Is attached to the equipment,
A recess or a hole for positioning the optical component and attaching it to an apparatus is formed in each of a part of the pair of connecting members connected to the separated optical member. .
[0008]
In the present invention, since a plurality of optical members are integrally connected via a connecting member , even if each optical member is small, it can be handled as a collective assembly. Handling at the time of assembly. Moreover, in the operation | work which loads an optical member to a vapor deposition apparatus etc., since it is not necessary to load for every optical member, and a loading operation | work can be performed per aggregate | assembly of a some optical member, work efficiency can be improved.
[0009]
Furthermore, since each individual optical member performs the work of separating the optical member from the optical member assembly and attaching it to the optical head mechanism or the like, if the optical member assembly is viewed, The front and back surfaces can be easily identified.
[0011]
With the above configuration, it is possible to facilitate the operation of attaching the optical member to the optical head device or the like. Moreover, the mounting accuracy of the optical member can be increased.
[0012]
In this case, between the optical member and the connecting member, the same resin material can be assumed to be integrally formed, or between the optical member and the connecting member may be formed of a different resin material.
[0013]
Further, it is preferable that a cutting portion for separating each optical member is formed on the connecting member, and the cutting operation can be easily performed.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings.
[0018]
FIG. 1 is a perspective view showing an assembly of mirrors as an embodiment of an optical member according to the present invention, in which A is a state where the optical member is connected in one direction, and B is a state where it is connected in the other direction. ing. FIG. 2 is a perspective view showing a mounting state of the mirror of FIG. 1A.
[0019]
In FIG. 1A, a plurality of triangular prism-shaped optical members 2, 2, 2,... Are arranged at regular intervals with the inclined surface (optical surface) 2a directed in the longitudinal direction (Y) in the figure. In FIG. 1B, similar optical members 2, 2, 2,... Are arranged at regular intervals with the side surface 2b directed in the longitudinal direction (Y).
[0020]
Each optical member 2 shown in FIGS. 1A and 1B is made of a transparent resin material, and a plurality of metal films and dielectric films are laminated on the inclined surface 2a by means such as vapor deposition. The optical member 2 is, for example, a total reflection mirror. In an optical head device or the like, the optical member 2 reflects parallel light emitted from a light emitting element such as a laser and guides it to the disk surface via a convex lens.
[0021]
Connecting members 3 and 3 extending in the longitudinal direction are provided on the X side 1 and X2 side of each optical member 2, and adjacent optical members 2 are connected by the connecting members 3 and 3. The plurality of optical members 2 are connected by the connecting members 3 and 3 to form an integrated optical member assembly 1. The connecting members 3 and 3 are formed with reference portions 3a and 3a cut out in a V shape.
[0022]
The connecting members 3 and 3 are made of the same resin material as the resin material on which the optical member 2 is formed. Alternatively, a plate-like metal material can be used as the connecting members 3 and 3 instead of the resin material. The optical member assembly 1 can be cut along a cutting line LL. In this case, the individual optical members 2 can be easily separated by forming a cutting portion made of, for example, a V-shaped groove on the connecting members 3 and 3 along the cutting line LL.
[0023]
The optical member 2 shown in FIG. 2 cuts off a part of the assembly 1 of optical members in FIG. 1A. In FIG. 2, reference numeral 4 indicates a base provided in an optical head device or the like. Protrusions 4 a and 4 a are formed at predetermined positions of the base 4, and an opposing dimension W between one convex part 4 a and the other convex part 4 a is a reference formed on the connecting members 3 and 3. The dimension between the parts 3a and 3a is set to the same dimension. Therefore, the reference portion 3a of the optical element 2, the convex portion 4a of the base 4 in 3a, by hooking the 4a, it is possible to position the optical member at a predetermined location in the optical head device. Thus, the connecting member 3 not only connects the individual optical members 2 but can also be used as a member for fixing the individual optical members 2, so there is no waste of material.
[0024]
Figure 3 shows a perspective view of the assembly of the optical member mainly composed of lenses, A is a perspective view showing the assembly of an optical element of the second embodiment, B is a reference example of assembly of the optical member FIG. 4 is a perspective view showing an assembly of optical members mainly including a flat mirror as a third embodiment, and FIG. 5 is an assembly of optical members mainly using a prism as a fourth embodiment. It is a perspective view which shows a body.
[0025]
In FIG. 3A, the individual lenses 12, 12, 12,..., Which are optical members, are connected by a pair of connecting members 3, 3 to form an optical member assembly 10 including a plurality of lenses 12. . In FIG. 3B, the individual lenses 12, 12, 12,... Are connected by a single connecting member 3 to form an optical member assembly 11.
[0026]
In FIG. 4, the flat mirrors 22, 22,..., Which are optical members, are connected by a pair of connecting members 3, 3 to form an optical member assembly 21 including a plurality of flat mirrors 22. In FIG. 5, the triangular prisms 32, 32, 32,... That are optical members are connected by a pair of connecting members 3, 3 to form an optical member assembly 31 including the triangular prisms 32. Yes.
[0027]
In the optical member aggregates 10, 11, 21, 31 shown in FIGS. 3 to 5, the individual optical members 12, 22, 32 are cut along cutting lines LL that cross the connecting members 3. It is possible to cut into optical members. In addition, on both sides of the cutting line LL, reference portions 3a and 3a made of through holes are formed. Therefore, the individual optical members 12, 22, and 32 are inserted into the convex portions provided on the base or the like as in FIG. 2 so that the reference portions 3a and 3a are inserted into the predetermined portions in the equipment such as the optical head device. It can be easily positioned and fixed at a location.
[0028]
In an optical member manufacturing factory or the like, by forming individual optical members 2, 12, 22, 32 as optical member aggregates 1, 10, 11, 21, 31 connected by connecting members 3, Inspection, packing, and the like can be performed for each of the optical member assemblies 1, 10, 11, 21, 31. Therefore, the handling becomes easier as compared with the case of handling the individual optical members 2, 12, 22, and 32.
[0029]
Further, in an assembly factory where the assembly of optical members 1, 10, 11, 21, 31 is delivered, an operator performs assembly work while separating the optical members 2, 12, 22, and 32 during work. As a result, optical components are less likely to be lost. Furthermore, since the front and back surfaces of the optical member can be distinguished at a glance by looking at the optical member aggregates 1, 10, 11, 21, 31, the optical members 2, 12, 22, 32 can be distinguished. A mounting error or the like can be prevented.
[0030]
Hereinafter, a method for producing the assembly of the optical members will be described.
FIG. 6 is a process diagram showing a method for manufacturing an optical member, in which A is a first process, B is a second process, and C is a process of continuously forming an optical member. In this manufacturing method, as shown in FIGS. 6A to 6C, a molding die 41 for molding the optical member 2, an extruder 42 for injecting a molten resin material into the molding die 41, and a transfer means 43. Is provided. The mold 41 is composed of a pair of upper mold 41A and lower mold 41B.
[0031]
A plurality of (three in FIG. 6) cavities 41a, 41a, and 41a arranged at predetermined intervals in the longitudinal direction are provided inside the molding upper die 41A. In the molding upper die 41A, a runner 41b and an injection port 41c for guiding the molten resin to the plurality of cavities 41a, 41a, 41a are formed. The extruder 42 is, for example, a screw extruder. In the barrel of the extruder 42, the resin material is melted and stirred, and the molten resin is pushed out from the nozzle at the tip of the resin material to the injection port 41c of the upper mold 41A. The transfer means 43 is, for example, a belt conveyor, and can move the belt 43a intermittently in a certain direction (the Y1 direction in FIG. 5).
[0032]
The manufacturing method in the present embodiment is based on insert molding. That is, as shown in FIG. 6A, in the first step, a molded lower mold 41B is placed on the belt 43a of the transfer means 43, and the connecting member 3 made of a resin material is placed in the recess of the molded lower mold 41B. 3 are arranged in parallel with each other in the longitudinal (Y) direction. In the second step shown in FIG. 6B, the molding upper die 41A is set on the molding lower die 41B, and the connecting members 3 and 3 are set between the molding upper die 41A and the molding lower die 41B. The Then, the tip of the nozzle of the extruder 42 is inserted into the injection port 41c, and molten resin is injected into each cavity 41a through the runner 41b.
[0033]
When the molding upper die 41A is pulled upward in the drawing after a predetermined time has elapsed, the optical member assembly 1 in which the connecting member 3 and the plurality of optical members 2 are integrated can be formed on the molding lower die 41B. .
[0034]
Also, as shown in FIG. 6C, after the second step is completed, the transfer means 43 is sent by a predetermined distance in the upstream (Y1) direction, and the first step and the second step are repeated again and continuously. It may be. In this case, a new optical member assembly 1 is continuously placed on the connecting members 3 and 3 next to the optical member assembly 1 formed in the previous first and second steps. Can be formed. Therefore, the number of individual optical members 2 to be formed can be adjusted in units of the optical member assembly 1 according to the length of the connecting members 3 and 3.
[0035]
The molding die 41 may be one that integrally molds the optical member 2 and the connecting member 3. In this case, it is preferable to form the reference portion 3a and the cutting portion in the cavity portion corresponding to the connecting member 3. Thereby, the reference | standard part 3a and a cutting | disconnection part can be integrally molded in the connection member 3. FIG.
[0036]
【The invention's effect】
According to the present invention described in detail above, each optical member can be handled as a single assembly of optical components, so that it is easy to handle at the time of inspection, packing, assembly and the like.
[0037]
Moreover, by providing the reference portion on the connecting member, the optical member can be easily positioned, and the optical member can be fixed with high accuracy.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an assembly of mirrors as an embodiment of an optical member according to the present invention, in which A is a state where optical members are connected in one direction, and B is a state where they are connected in another direction. ,
FIG. 2 is a perspective view showing a mounting state of the mirror of FIG. 1A;
Figure 3 shows a perspective view of the assembly of the optical member mainly composed of lenses, A is a reference example of a collection of perspective views, B is an optical member showing the assembly of the optical element as the second embodiment A perspective view,
FIG. 4 is a perspective view showing an assembly of optical members mainly composed of flat plate mirrors as a third embodiment;
FIG. 5 is a perspective view showing an assembly of optical members mainly composed of prisms as a fourth embodiment;
FIG. 6 is a process diagram showing a method for manufacturing an optical member, wherein A is a first process, B is a second process, and C is a process of continuously forming an optical member.
[Explanation of symbols]
1,10,11,21,31 Assembly of optical members 2,12,22,32 Optical member 3 Connecting member 3a Reference portion 4a Protruding portion 41 Mold 41a Cavity 42 Extruder 43 Transfer means L Cutting line

Claims (3)

A resin optical member that reflects or transmits incident light and a resin connection member positioned between the plurality of optical members arranged in a line at regular intervals are provided, and the connection members are adjacent to each other. Adjacent optical members are connected by a pair of connecting members provided between the optical members and extending in parallel with each other,
Said connecting member of said adjacent optical members intermediate is cleaved the separated individual of the optical member, remain a portion of the separated the optical member and the pair of the connecting member is connected, the optical member Is attached to the equipment,
A recess or a hole for positioning the optical component and attaching to the device is formed in each of a part of the pair of connecting members connected to the separated optical member. Aggregation. The optical member and said connecting member, assembly of the optical element according to claim 1, characterized in that it is integrally molded by the same resin material. The optical member and said connecting member, assembly of claim 1 or 2, wherein the optical member, characterized in that it is formed of different resin materials.

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